Term of the Road Dictionary

air pollution

  • Language : PIARC Road Dictionary / English
  • Theme : Environment Environmental Protection
  • Definition : Degradation of air quality resulting from unwanted chemicals or other materials occurring in the air. Note: usually the presence of substances in the atmosphere resulting from either human activity or natural processes. These substances are present in sufficient concentration, for a sufficient time and under circumstances that cause them to interfere with the comfort, health or welfare of persons or the environment [ISO 4225/PIARC].

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